new (experimental) files for bounding box filtering in building count
basic code appears to be working - much faster for a box in Italy but still slow for large countries such as Russia
Added test files and readme
Test in US
Perform total pop query only once
Code cleanup
Pre-calculate total population and grid count for all known geo regions -- more work needed to update ged2.geographic region table with this data and also to make a function or similar to generate totals for geo regions which do not have them
renamed file
renamed file
Update sql to update geographic regions with a NULL tot_pop
Use pre-cached total pop value from geographic_region if available, calculate and emit WARNING otherwise
Added support for grid count and bounding box in geographic region
Updated to handle single cell regions (e.g. Vatican City)
Added support for regions with 0 grid cells
Only consider cells with pop_value > 0
Merge pull request #12 from pslh/bounding_box

Bounding box